the answer is -$97 for sure. tvb now,tvbnow,bttvb/ S9 K9 {' N$ D. h1 B8 t1 t0 T
Think about it this way 5.39.217.77:8898 x: r& @, @6 k% s3 O: v) `6 B! T
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)( `, Y- k/ ~. a7 D7 b. b
2) Now, the owner discovered that the 100 bucks is fake. You can think this as a lost of $100. therefore the overall gain is $3-$100 = -$97 |